Warp-thread-detecting device.



"No. 887,475. PATENTED MAY 12, 1908.

W GROSS WARP THREAD DETECTING DEVICE.

APPLIOATION FILED AUG. 16. 1907.

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UNITED STATES PATENT oEEIcE.

\VILHELM GROSS, OF FALL RIVER, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF

HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

WARP-THBEAD-DETECTING DEVICE.

Specification of Letters Patent.

Patented May 12, 1908.

Application filed August 18, 1907. Serial No. 388,811.

and useful Improvements in War -Thread-' Detecting Devices, of which the fo lowing is a s ecification, reference being bad therein to t e accompanyin drawing.

This invention relates to warp thread de tectors and has for its ob'ect to provide a simple and effective means or opening the warp, or separating the threads so as to clearly indiriiate the position of a slack or broken warp en.

In practice it is found difficult tofiiid the ends of a broken thread in the warp. Many devices have been devised for indicating the osition of such a thread, among others bemg thin flat wires which are hung on the threads and caused to indicate the position of the broken end by being allowed to drop out of line with the other wires, but these wires are so very thin and small that a dis laced one is almost as hard to find as the t eads themselves, and therefore the o erator is- Bdy my improved device, the war is opened or r awn wlde apart longitudina ly at the point where the thread is broken, thereby lainly showing the exact position of the roken thread which may then be easily repairedwithout loss of tlme. My preferred means of accomplishin this object is by using a thin flatwire on lade and suspending the same at any convenient place on each individual war thread. A transversely reciprocating ar is arranged to operate throu h these wireswhereb is broken or becomes undu y slack the wire drops and en a es said reciprocating bar, which is provided with teeth or other engaging means, and by the movement of this bar said wire is drawnv to one side, widely separating the warp threads at that point to clearly indicate the position of the broken on The invention is' fully set forth in this specificationand more particularly pointed out in the appended claims.

' Int-heaccompanying drawings: Figure 1- is a view in outline illustrating portions of a when athread loom, and showing my drop wires located in the rear and suspended on the warp threads, also showing a cammotion for operatin the reciprocating bar. Fig. 2is a side e evation showing a portion of the reciprocating serrated bar and the means by which the sameis operated, also illustratin the pos tion the wires will take when one rops and is engaged and drawn to one side by said bar.

Fig. 3is a perspective view of one form of drcfp wire. eferrin to the drawings, at 1 is the usual lay, 2 the reast beam and 3 the knock-off lever, ;The warp 4 is run in the usual we from the beam 5 over the rod 6 and throng the heddles 7 and 8. The drop wires 9 are shown in Fig. 3 as being thin flat blades having an elongated eye 10 through which the reciprocating bar passes. This blade 1s also provided with a small hole 11 through WhlCh the thread is passed that suspends or supports the blade while said thread is taut and in its normal osition. I do not, however, confine myself to this construction of d ro wire as the same may be made-in any deslre or convenient form. Thereci rocatory bar '12 is preferably made of. thin fiat stock, notched or serrated on its upper edge, or provided with other suitable engaging means,

and held in'suitable bearings (not shown) either above orbelow the warp the same being caused to reciprocate transversely across the 100111 by any suitable means. I A'simple method of operating this bar is shown comprisin a cam 13 which is rotated in time with t e loom, and is caused to draw said bar in one direction through the lever 14 and cord 15 which is attached to. one end of said bar 12 and arrangedto work, over the pulley 16, a s ring 17 being provided to draw the bar in t e o posite direction. I do not confine my self, owever, to this means of opera ing the bar as any desired or convenient method may be employed for moving the same.

The operation of the device may be more fully described as follows: My improved detecting device may be attached to'the warp threads of any ordinary loom and a bar provided with suitable engaging means and adapted to reciprocate in time with the lay is arranged to pass through said drop wires, and if for any cause one of said threads be-' comes slack or broken the wire which was supported by said thread drops into engagementiwith the reciprocating bar and is at once drawn to one side, separating the warp and the mores, leaving a sufiicient space to clearly indicate the position of the broken 1 thread.

Having thus describedmy invention, what- I claim as new and desire to secure by Letters Patent, is:

1. In a Warp thread detecting device, means for automatically drawing the adjacent warp threads to one side when one or more of said threads break whereby the position of the brokenendhnay be clearly indicated.

2yln a Warp thread detecting device,

means for engagingand automatically separating the Warp threads laterally when one of said threads break whereby the position of the broken endmay be readily located.

3. In a warp thread detecting device, a reciprocating bar, and means operated by sai bar to draw said threads apart laterally when one of said threads breaks, whereby the positionof the broken end may be readily asc'ertained. p y A ,d. In a warpthread detecting device, a detesting Wire supported on each thread, and

automatically actuated means for engaging said wires to drawsaid threads apart longitu dinally when one of said threads breaks, whereby the position of the broken thread may be readily determined.

5. In a device of the character described, a reciprocating bar, detector bars supported by each thread, and means for automatically actuating said bar to engage said detector bars to draw said threads apart laterally when one of said'threads breaks whereby the position of the broken end may be readily ascertained.

6. In a warp thread detecting device, a de tecting wire supported on each thread, a bar provided with engaging means and ada ted to receive each wire when allowed to thereon, and means for reciprocating said bar, whereby said detector wire will move with said bar when in engagement therewith.

7. A warp thread detecting device for looms, comprising a detector wire supported on each thread, a serrated bar sup orted in position to engage said Wires when a lowed to drop, and means for reciprocating said bar, whereby said detector wire will move with said bar when in engagement therewith.

8. A Warp thread detecting device for looms comprising a detector Wire su ported on each thread, a bar provided wit serrations or notches on its upper edge, said bar beingadapted to pass through an aperture in each of said wires, and means for giving a longitudinally reciprocating motion to said bar whereby when a wire drops it is engaged by said bar and carried to one side to open the warp.

In testimony whereof I aflix my signature in presence of two witnesses.

' NILHELM GROSS. Witnesses:

i THOMAS L. VAN NORDEN,

HENRY LEIFHEIT.

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